Flashcards in Transformers Deck (4)
Why does a transformer not work with direct current?
A changing magnetic field is necessary to induce ac in the secondary coil.
Complete the statement with these words:
Current, magnetic field, pd, primary, secondary
In a transformer, an alternating ________ is passed through the ________ coil. This coil creates an alternating ________ that passes through the ________ coil. As a result, an alternating ________ is induced in the ________ coil.
In a transformer, an alternating current is passed through the primary coil. This coil creates an alternating magnetic field that passes through the secondary coil. As a result, an alternating pd is induced in the secondary coil.
Why is it important that the coil wires of a transformer are insulated?
If they were, the current would pass through the iron core and there would be no change in potential difference.